Swivel torque tube arrangement

B - Operations – Transporting – 63 – B

Patent

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Details

B63B 22/02 (2006.01) B63B 21/50 (2006.01)

Patent

CA 2332996

An improved product transfer system is disclosed for a turret moored FPSO (10). A swivel stack torque tube (105) is provided such that the swivel stack (100) can be recessed below the manifold decks (103), but still allow swivel torque reactions to be transferred to the ship structure. Recessing of the swivel stack downwardly with respect to the manifold decks reduces the height of the access structure and locates the swivel stack center of gravity closer to the center of gravity of the vessel. This arrangement results in reduced loads to the turret structure (20) which supports the swivel stack and reduced height and size of the access structure for the swivel stack.

L'invention concerne un système amélioré de transfert de produit pour navire FPSO amarré par tourelle. Ce système comprend un tube de réaction (105) à empilement de pivots, placé de sorte que cet empilement de pivots (100) peut s'enfoncer en-deçà des ponts de claviature (103), tout en permettant de transférer les réactions du couple pivotant à la structure du navire. Tout enfoncement dudit empilement de pivots vers le bas par rapport aux ponts de claviature permet par ailleurs de réduire la hauteur de la structure d'accès et de localiser le centre de gravité de l'empilement de pivots le plus proche du centre de gravité du navire. Le système de cette invention permet donc de diminuer les charges sur la structure tourelle (20), laquelle soutient l'empilement de pivots, et de réduire la hauteur et la taille de la structure d'accès à cet empilement.

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